Revert "Gyp support for Ozone." This broke the Linux standalone build. Error message seen when running "gclient runhooks": "gyp: name 'use_ozone' is not defined while evaluating condition 'OS=="linux" and use_ozone==0' in build/ANGLE.gyp while trying to load build/ANGLE.gyp" This reverts commit 35e65e921394713f89df8d9bfe243b4abb5e9bd7. Change-Id: Iee5f08195ee1c74ead99bb9d70d04928c9bae7af Reviewed-on: https://chromium-review.googlesource.com/338290 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>